/Engine/Source/Runtime/GeometryCore/Public/Spatial/ZOrderCurvePoints.h
Generate a "Biased Randomized Insertion Order" (BRIO) ordering for a point set by randomly bucketing the points, then applying Z-Order-Curve sorting (above) to each bucket This gives an ordering with point locality but enough randomization to typically avoid worst case behavior if using the ordering for Delaunay meshing
struct FBRIOPoints
int32
MaxTreeDepth
Inputs.
TArray< int32 >
Order
Outputs.